39results about How to "Reduce construction work costs" patented technology

The invention provides a high temperature resistant silicate cement paste and a preparation method thereof. The high temperature resistant silicate cement paste comprises the following components in parts by weight: 100 parts of oil well silicate cement, 60 to 85 parts of a high-temperature reinforcing material, 68 to 80 parts of fresh water, 1 to 200 parts of a density conditioning agent, 0.1 to1.5 parts of a suspension stabilizer, 0.8 to 1.5 parts of a dispersing agent, 3 to 4 parts of a fluid loss agent, 0 to 3 parts of a retarder and 0.2 to 0.8 part of defoamer. The high temperature resistant silicate cement paste has high sedimentation stability and is rapid in strength development at a low temperature, the compressive strength at the high temperature of 350 DEG C reaches up to morethan 40 MPa, the long-term high-temperature compressive strength development is stable and free of declination, so that the field application requirement of a heavy oil thermal recovery well can be met, and the level of silicate G-level cement used for oil gas well cementing operation is reached.

The invention relates to an anchoring ball type casing truing unit and a truing method thereof, and overcomes the defects that during the repairing casing operation, the existing roll type truing unit is easy to damage a drilling rig, and the unstable state of a tubular column enables the time for repairing the operation and the operation cost to be increased. In the invention, an upper joint (1), an aerial drainage assembly (32), an anchoring assembly (33), a hydraulic cylinder assembly (34) and a lower joint (17) are arranged on an anchoring device (30) and fixedly connected in sequence; a lower joint (17) is internally provided with a check valve (35); the lower joint (17) of the anchoring device (30) is fixedly connected with the upper end of the ball truing unit (31), or the lower joint (17), a drill collar and the ball truing device (31) are fixedly connected from up to down. The invention has the following benefit effects of simple structure and reasonable design, is convenientto operate, is safe and reliable, avoids the damage to the drill, reduces the construction period, has high working performance and reduces the field operation cost.

The invention discloses an upright rod capable of being erected and lowered depending on manpower. The upright rod provided by the invention mainly comprises a rod body and an erecting device capable of erecting and lowering the rod body, wherein the erecting device mainly comprises a fixed plate fixed with an upright rod base, a bottom plate fixedly linked with the rod body to serve as a lever arm, and a feed screw nut erecting driving mechanism; one side of the bottom plate is hinged with the fixed plate through a hinge structure, and the other side of the bottom plate is hinged with a nut used for forming the erecting driving mechanism through a hinge structure in an action mode; a feed screw used for forming the erecting driving mechanism is arranged on the fixed plate through a hingestructure; and the bottom plate is connected with the fixed plate through a fixed linking structure after the rod body is erected. The upright rod provided by the invention has the advantages that the rod body of the upright rod can be erected and lowered by means of operating the erecting device of the upright rod only depending on the manpower with no need of devices and equipment besides the upright rod, thereby solving the problems of high erecting operation cost for using hoisting equipment in the prior art, coordination operation requirements on multiple persons, large labor strength, poor safety and the like when the upright rod is erected and lowered completely depending on the manpower.

The invention provides a layered ignition and gas injection pipe column which comprises an inner pipe column (5) and an outer pipe column (7), wherein the outer pipe column (7) comprises a first gas injection valve (10), a fourth gas injection valve (16) and a fifth gas injection valve (23) which are sequentially arranged from top to bottom, the inner pipe column (5) comprises a second gas injection valve (11) and a third gas injection valve (15) which are sequentially arranged from top to bottom, the first gas injection valve (10), the second gas injection valve (11) and the third gas injection valve (15) are all temperature control gas injection valves capable of being switched by multiple times, and the fourth gas injection valve (16) and the fifth gas injection valve (23) are both temperature control gas injection valves capable of being switched by only one time, so that the temperature control gas injection valves capable of being switched by only one time can be opened when the temperature in the valves is greater than or equal to a preset value. According to the layered ignition and gas injection pipe column provided by the invention, multi-layer ignition and gas injection can be realized, the requirement of ignition of an oil well is meet, and the operation efficiency of igniting the well is improved.

The invention relates to an acidification method of recoverable quick-dissolving viscous acid. The method comprises the following steps of: uniformly mixing thickening agents, potassium chlorides and a hydrochloric acid solution on the ground; then pumping and injecting the mixture into the formation for acidification; closing a well for 30 minutes for controlling blow off after the acidification completion; entering flow-back fluid subjected to gas-liquid separation into an acid tank and performing still standing for 2 hours for delamination; respectively collecting a residual acid solution and the thickening agents; performing detection; if the design requirement is not reached, adding a certain amount of hydrochloric acid and thickening agents until the concentration of the acid solution conforms to the requirement; then, adding a certain number of potassium chlorides to reach the design requirement; performing the acidification construction again; repeating the steps; and completing the liquid repeated utilization. The acidification method has the advantages that the acid liquid filtration loss is reduced; the pollution on the formation is reduced; the flow-back fluid is directly recovered to the acid tank, so that the earth surface pollution is reduced; the flow-back fluid is recovered, so that the consumption of the thickening agents, water and the hydrochloric acid is reduced; after the flow-back fluid is treated on the ground, the flow-back fluid can be reused after the supplementary addition of a small number of the thickening agents, the hydrochloric acid and the potassium chloride; the construction operation cost is reduced; and the multi-time repeated utilization can be realized.

The invention discloses an around synchronization hydraumatic jacking process of upper module of an ultra-large marine oil platform. The around synchronization hydraumatic jacking process comprises the following steps of: step 1, arranging a jacking and supporting mechanism at the bottom of each landing leg; step 2, controlling a jacking device to jack a set height journey, supporting an upper structure by virtue of a radial arm, and enabling a jacking device to retract; step 3, enabling a support beam slippage rail to enter a position below the upper structure; step 4, the jacking device supports jacking the set height journey by virtue of the jacking device, rotating the radial arm to support the upper structure, and enabling the jacking device to retract; step 5, enabling a next group of support beam slippage rails to enter the lower part of the support beam, enabling the jacking device to retract, and jacking the upper module for a set height; step 6, repeating the step 3, the step 4 and the step 5 until jacking the upper module to a preset height; step 7, transporting a lower structure to the bottom of the upper module; step 8, enabling the jacking device to retract, and connecting the upper module and the lower structure in a butt joint manner; and step 9, unloading and dismantling auxiliary equipment. The jacking process provided by the invention can realize the multipoint and around synchronization jacking of the upper module and can be used for carrying out effective control on the lifting speed and the displacement precision.

The invention relates to a dual-camera device for monitoring the welding quality of super-thick-wall high alloy steel pipelines. According to the dual-camera device for monitoring the welding quality of super-thick-wall high alloy steel pipeline, two detachable gear rails are symmetrically arranged at the peripheries of the two sides of the beveled edge between two pipelines to be welded, the two detachable gear rails are connected with two camera devices through two connecting parts, and the two camera devices are obliquely and symmetrically arranged. The camera devices comprise fastening screws arranged at the left ends of the connecting parts, antiskid rail blocks arranged at the right ends of the connecting parts, small mesh gears arranged in the connecting parts and connected with the antiskid rail blocks and fixed seats arranged at the upper ends of the connecting parts. Cameras are arranged at the top ends of the fixed seats, photoelectric sensors are arranged at the upper ends of the fixed seats, and the photoelectric sensors are connected with the antiskid rail blocks through transmission lines. The dual-camera device can accurately decide types and specific sizes of welding defects and locate the positions of the welding defects, can effectively reduce the work amount for patching on-site welding junctions, improves work efficiency and reduces construction cost.